How to Make It
Cook the pasta according to the package directions, adding the green beans during the last 3 minutes of cooking. Drain and run under cold water to cool.
Toss the cooled pasta and green beans with the red beans, parsley, Parmesan, olive oil, lemon juice, ½ teaspoon kosher salt, and ¼ teaspoon black pepper. Divide the salad between 2 containers and refrigerate for up to 1 day.